Modeling of Optical Beam Spread in Sea Ice
SEQUOIA SCIENTIFIC INC MERCER ISLAND WA
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This two year theoretical investigation of the optical properties of first year sea ice yielded several important results 1 beam spread function measurements provide an important constraint on inversion of optical data to obtain ice scattering properties 2 several hundred optical path lengths can be required to approach the asymptotic radiance distribution for point light sources, even though the ice is highly scattering 3 photon diffusion theory gives a reasonably good description of light propagation deep within sea ice and, more importantly, shows that sea ice scattering phase functions are highly peaked near the forward scattering direction 4 classical radiative transfer theory is adequate for prediction of light propagation within sea ice, and 5 it is possible to begin with sea ice physical properties and proceed in a rigorous fashion to predict sea ice inherent and apparent optical properties.
- Snow, Ice and Permafrost